CyberHunter
Local dataset, no network
// Other services

Port 1876: ewcappsrv

Port 1876 is assigned by IANA to ewcappsrv (ewcappsrv).

1876

How ewcappsrv works

Other services
client:1876ewcappsrvresponse client:1876ewcappsrvresponse

The client sends a request to port 1876 and the ewcappsrv service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 1876 dangerous?

We have no specific security note for port 1876. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 1876

ServicePortTransportDescriptionReferenceUpdated
ewcappsrv 1876 TCP, UDP ewcappsrv - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1876, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1876'      # process listening on 1876
sudo lsof -nP -i :1876

macOS

sudo lsof -nP -i :1876

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1876 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1876
netstat -ano | findstr :1876

From another machine

nmap -p 1876 -sV <host>
sudo nmap -sU -p 1876 <host>
nc -zv <host> 1876

Block it in the firewall

sudo ufw deny 1876/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1876" -Direction Inbound -LocalPort 1876 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1876 used for?

Port 1876 is assigned by IANA to ewcappsrv (ewcappsrv).

Is port 1876 TCP or UDP?

Port 1876 is registered for TCP and UDP.

Is it safe to open port 1876?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 1876 is open?

On Linux run "ss -ltnup 'sport = :1876'", on macOS "lsof -nP -i :1876", and on Windows "netstat -ano | findstr :1876" to see the local process. From another machine, "nmap -p 1876 <host>" shows whether it is reachable.

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